Pulp-screen roll.



No. 847,352. PATENTED MAR. 19, 1907.

A. M. MEINGKE.

PULP SCREEN ROLL.

APPLICATION I'ILED DEC. '7, 1906.

ll/z'iflessesi j 4 I J 177%872207', M a W UNITED STATES PATENT OFFICE. ALFRED M. MEINCKE, OF WINCHESTER, MASSACHUSETTS.

PULP-SCREEN, RoLL.

No. 847.35g.

Specification of Letters Patent.

Application filed December 7, 1906. Serial No. 346,140.

Patented March 19, 1907.

To all whom it may concern:

Be it known that I, ALFRED M. MEINOKE of Winchester, county of Middlesex, State of Massachusetts, have invented an Im rovement in Pulp-Screen Rolls, of which t e following description, in connection with the accompanying drawin s, is a specification, like characters on the rawings representing like parts.

In the art of paper-making a pulp-screen roll is employed having a plurallty of separate compartments dis osed radially about the axis thereof and a a ted to operate in conjunction with means or exhausting the air successively from said compartments or groups of compartments as the roll is revolved to draw the fine particles and fibers which are suspended in the water onto the screen and to remove therefrom a large percenta e of the water and also with means for intro ucin air successively to said comparte ments as t e roll is revolved to assist in discharging or removin from the screen the collected particles and bers. Ordinarily a suction device and a blowing device are employed for respectively exhausting and introducing air from and to the compartments or groups thereof, and to be effective they must act with considerable force, and as a result many fine particles and small fibers are drawn through the usual wire screen with the water and wasted. Therefore the apparatus is not as economical as desired.

This invention has for its object to im prove the construction of a pulp-screen roll of this description which is adapted to operate in conjunction with suction and blowing devices or their equivalent, whereby the fine particles and small fibers which are now drawn through the wire screen and wasted will be retained upon the screen and subsequently discharged or removed therefrom with the larger or coarser particles and fibers.

My invention consists, essentially, in the employment of a screen for the roll which is made of a textile fabric as silk, for instance the meshes thereof being so fine that the fine particles cannot be drawn through it, and a means for sup orting said textile fabric on the roll in sucli manner as to resist inward pressure upon it due to theaction of the suction device and also to resist outward pressure upon it due to the action of the blowing devicethat is to say, said textile fabric is so supported as to resist the forces of both the suction and blowing devices.

l the outside of the screen 0.

Figure 1 shows a side view of a ulp-screen roll embodying this invention. Fig. 2 is an end view of the same. Fig. 3 is a sectional detail of a portion of the screen embodyin my invention. Figs. 4 and 5 are sectiona details of modified forms of screens.

The pulp-screen roll has walls at extending radially from a hollow shaft 0/. or core nearly to the periphery and terminatin in oblique walls a at the periphery, and sai walls with the obli ue portions extend from end to end of the r0 and provide a plurality of separate radially-disposed compartments. Suitable braces are provided for these walls. A roll of this construction ,is not of my invention. The roll is covered with a screen, and it is in the construction of this screen and the su ports therefor that my invention particular y resides. Upon the roll I first lace several courses I) of Wire, (see Figs. 2 an 3,) or I may place thereon a layer of Woven wire, as shown in Fig. 4, and said courses of wire or said woven wire forms an open-work support for the under side of the screen. The screen 0 is then placed upon the open-work support I) and attached to the roll at its edges and at other desirable points. The screen 0 is composed of textile fabric, silk being preferably employed. This material is of fine mesh and retains the fine particles as well as the coarser particles which are sus ended in the water.

' upon the roll on the outside of said screen 0,

and I may employ as such support another layer of woven wire, as shown 1n Fig. 3, or I may wind upon the roll courses of wire, as shown in Fig. 5, or I may attach to the ends. of the roll narrow strips extending lengthwise thereof, as shown in Fig. 4, it being understood that I do not desire to limit my invention to the construction of the open-work support which is provided on the inside or on The open-work supports do not retard the action of the screen in any essential particular, but serve to support the screen in such manner that it will resist: the pressure upon it due to the employment of the suction and blowing devices. In fact, without these 0 en-work supports a screen made of textile abric will not withstand the pressure upon it'of the suction and blowing devices. At one or "both ends of the roll a segmental plate eis provided which overlies the endsof a number of the compartments, to-which the exhaust device and the blowingldeviceflreponnected.

IIO

ters Patent, is-

1. A pulp-screen r011 havlng an open- -work screen-support extending entirely around it and from end t'oend of it, a screen of textile'fabric arranged on said support and another open-Work screen-support arranged on said screen, which entirely incloses it substantially as described.

2. A pulp-screen roll adapted to operate in conjunction with suction and blowing devices, I

having a plurality of compartments, and havin two concentrically-arranged c lindrica1 y-formed screen-supports exten ing entirely around it and from end to end of it, and a screen oftextile fabric interposed between said screen-supports, substantially as y described.

I In testimony whereof I have signed 'my name to this specification in the presence of twp subscribing witnesses.

ALFRED M; MEINCKE.

Witnesses: f

Y B. J. NOYES,

H. B. DAVIS. 

